Colorado at Arizona

Colorado is fifth in baseball in runs scored with a winning road record. Colorado is off a 5-4 victory in the series opener as a +165 dog that drew it within four games of Arizona in the Wild Card standings. The Rockies have won five in a row and seven of eight. Colorado is 3.5 games ahead of the St. Louis Cardinals for the second Wild Card spot and have won six straight on the road. Colorado starter Jon Gray (7-4) is 4-2 with a 2.55 ERA in his past seven starts. He has also thrown well against the Diamondbacks this year, posting the triumph in Arizona on June 30 when he gave up two runs while recording a season-high 10 strikeouts over six innings. Arizona is favored again but has lost three of the first four contests on its seven-game homestand. With Colorado 29-18 after three or more consecutive road games, back the hot dog in this key pennant race matchup. Play Colorado.